The Woodward 9907-963, also cataloged as the 9907-963 Gas Turbine Pressure Transducer, operates as a dedicated hardware component for dynamic fuel pressure monitoring within dry low emissions (DLE) turbine control loops. The unit converts applied fluid and gas pressures into a continuous 4-20 mA current loop signal powered by a 24 VDC external supply, enabling rapid transient feedback to governor electronics and fuel metering valve actuators.

Hardware Specifications

Actuator Loop Feedback Response & Dynamic Pressure Sensing

The Woodward 9907-963 integrates corrosion-resistant diaphragm sensing elements designed to withstand harsh combustion media while optimizing actuator loop feedback response. The high-bandwidth transducer output delivers microsecond-level pressure variation tracking, providing the main turbine governor with real-time feedback required to make instantaneous valve positioning adjustments during load step changes.

Frequently Asked Questions

Q: What power source is required to drive the 4-20 mA analog output circuit?

A: The sensing loop requires a regulated 24 VDC external power supply to power the internal signal conditioning circuitry and output driver.

Q: What physical mounting methods are supported on the Woodward 9907-963 sensor body?

A: The transducer housing supports direct process connection through standard threaded ports or mated flange-mount adapters depending on pipeline requirements.

Q: How is environmental protection maintained in high-vibration turbine compartments?

A: The unit features an IP65 dustproof and water-resistant enclosure constructed from corrosion-resistant alloys rated for operational temperatures from -40 deg C to +125 deg C.

Field Installation Guidelines

• Isolate process piping and relieve internal pressure prior to threading or flanging the transducer into the sensing port.
• Apply appropriate high-temperature thread sealant or install approved gasket materials to ensure a gas-tight seal without over-torquing.
• Connect 24 VDC supply wires using two-core shielded twisted-pair cabling to minimize electromagnetic interference on the 4-20 mA signal.
• Terminate the cable shield at the control cabinet ground bar only, leaving the sensor-side shield ungrounded to prevent ground loops.
• Verify process joint integrity and perform leak testing prior to pressurizing the fuel manifold.